From: Guenter Roeck <linux@roeck-us.net>
To: Manuel Reimer <Manuel.Spam@nurfuerspam.de>
Cc: linux-kernel@vger.kernel.org
Subject: Re: 3.15.4 runs *significantly* slower than 3.15.3 on iMX233 CPU
Date: Mon, 7 Jul 2014 12:14:30 -0700 [thread overview]
Message-ID: <20140707191430.GA23004@roeck-us.net> (raw)
In-Reply-To: <lpeofi$1fl$1@ger.gmane.org>
On Mon, Jul 07, 2014 at 08:21:38PM +0200, Manuel Reimer wrote:
> Hello,
>
> maybe someone can help me to find the reason for this problem:
>
> If I run my iMX233 development board with an 3.15.3 kernel, then the
> performance is much better as with an 3.15.4 kernel.
>
> I have the first significant "hanging" here:
>
> [ 7.910000] sd 0:0:0:0: [sda] Attached SCSI removable disk
> [ 10.810000] random: nonblocking pool is initialized
> [ 24.310000] systemd[1]: systemd 214 running in system mode. (+PAM
> -AUDIT -SELINUX -IMA -SYSVINIT +LIBCRYPTSETUP +GCRYPT +ACL +XZ
> +SECCOMP -APPARMOR)
>
> After booting up it takes several seconds between entering the
> username and the password while with version 3.15.3 the password
> prompt appears almost immediately after entering the username.
>
Are you sure this did not just happen when you booted the new kernel
for the first time ? I have seen similar behavior with some distributions.
If it happens all the time, ie at subsequent boots as wel, you'll probably
have to bisect the problem. I have not seen an obvious culprit.
Guenter
next prev parent reply other threads:[~2014-07-07 19:14 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-07 18:21 3.15.4 runs *significantly* slower than 3.15.3 on iMX233 CPU Manuel Reimer
2014-07-07 19:14 ` Guenter Roeck [this message]
2014-07-07 19:29 ` Manuel Reimer
2014-07-07 19:42 ` Guenter Roeck
2014-07-07 19:55 ` Manuel Reimer
2014-07-07 20:37 ` Geert Uytterhoeven
-- strict thread matches above, loose matches on Subject: below --
2014-07-07 18:13 Manuel Reimer
2014-07-08 12:01 ` Marcelo Ricardo Leitner
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